Author
N. R. Davies
Other affiliations: University of New South Wales
Bio: N. R. Davies is an academic researcher from Imperial Chemical Industries. The author has contributed to research in topics: Isomerization & Phosphine. The author has an hindex of 6, co-authored 6 publications receiving 878 citations. Previous affiliations of N. R. Davies include University of New South Wales.
Topics: Isomerization, Phosphine, Hydride, Acceptor, Affinities
Papers
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702 citations
111 citations
TL;DR: In this article, it was shown from the infra-red spectrum that no deuterium entered the hydrocarbon when n-oct-1-ene isomerized in the presence of sodium tetrachloro µµ′-dichloro-dipalladate II dissolved in CH3CO2D.
Abstract: UNDER the influence of palladium II halides it has been shown1 that olefines undergo isomerization involving movement of the double bond to successive positions along the carbon chain. Information concerning the mechanism of this reaction has been elucidated on one hand by the use of deuterated acetic acid as solvent and by utilizing deuterated n-oct-1-ene on the other. Thus it was shown from the infra-red spectrum that no deuterium entered the hydrocarbon when n-oct-1-ene isomerized in the presence of sodium tetrachloro µµ′-dichloro–dipalladate II dissolved in CH3CO2D, proving that at no stage in the mechanism is hydrogen lost from the hydrocarbon either as proton or hydride ion.
32 citations
27 citations
11 citations
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TL;DR: In this paper, the rate data for the generalized nucleophilic displacement reaction were reviewed, and the authors presented a method to estimate the rate of the generalized displacement reaction in terms of the number of nucleophiles.
Abstract: Recently (1) the rate data for the generalized nucleophilic displacement reaction were reviewed.
8,433 citations
TL;DR: The results indicate that the bactericidal properties of the nanoparticles are size dependent, since the only nanoparticles that present a direct interaction with the bacteria preferentially have a diameter of approximately 1-10 nm.
Abstract: Nanotechnology is expected to open new avenues to fight and prevent disease using atomic scale tailoring of materials. Among the most promising nanomaterials with antibacterial properties are metallic nanoparticles, which exhibit increased chemical activity due to their large surface to volume ratios and crystallographic surface structure. The study of bactericidal nanomaterials is particularly timely considering the recent increase of new resistant strains of bacteria to the most potent antibiotics. This has promoted research in the well known activity of silver ions and silver-based compounds, including silver nanoparticles. The present work studies the effect of silver nanoparticles in the range of 1-100 nm on Gram-negative bacteria using high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM). Our results indicate that the bactericidal properties of the nanoparticles are size dependent, since the only nanoparticles that present a direct interaction with the bacteria preferentially have a diameter of approximately 1-10 nm.
5,609 citations
2,804 citations
TL;DR: In this article, the authors proposed a classification of metal ions according to their binding preferences (i.e. whether they seek out O-, N- or S-containing ligands).
1,144 citations
TL;DR: In this paper, a data base summarising the stability constants of more than 500 complexes is used to calculate speciation pictures for 58 trace elements in model seawater (pH 8.2) and freshwaters (PH 6 and 9).
961 citations